发明名称 BLOOD EXTRACTION DEVICE
摘要 A blood extraction device comprising a cannula, the front end of which can be pushed into the vein of a patient and the rear end of which opens into an inner tube which is located in the interior of a sample tubule that is hermetically closed at its rear end and closed at its front end apart from a vent. The inner tube is secured in the blood extraction position against withdrawal from the sample tubule by a cap with a releasable axial blocking means, preferably by a screw cap. A puncturable and self-closing membrane is mounted in the front part of the cap and in the blood extracting position sealingly closes the inner tube at its front end and simultaneously presses the inner tubewithout play against an abutment in the sample tubule. The inner tube and the closure cap are so connected to one another by means of a tow connection that, during axial removal of the cap from the sample tubule, the seal between the membrane and the inner tube is first cancelled and the inner tube is only subsequently moved with the cap.
申请公布号 CA2055678(C) 申请公布日期 1997.06.17
申请号 CA19912055678 申请日期 1991.11.15
申请人 WALTER SARSTEDT GERATE UND VERBRAUCHSMATERIAL FUER MEDIZIN UND WISSENSCHAFT 发明人 SARSTEDT, WALTER;FARBER, HORST
分类号 A61B5/15 主分类号 A61B5/15
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